Steam-generator



A. E. SNOW.

STEAM GENERATOR.

APPLICATION FILED JUNE 14. 1918.

Patented Oct. 4, 1921.

UNITED STATES PATENT, OFFICE.

Anrnun E. mom or 1mm, PENNSYLVANIA, AssIoNon 'ro rm: AMERICAN LAUNDRYMACHINERY comrANY, or NORWOOD, OHIO, A coaronA'rroN or 0x10.

STEAM-GENERATOR.

Specification of Letters Patent.

Patented Oct. 4, 1921.

Application filed June 14, 1918. Serial No. 240,089.

To all whom it may concern:

Be it known that I, ARTHUR E. SNOW, a citizen of the United States,-residing at Erie, in the county of Erie and State of Pennsylvania, haveinvented certain new and useful Improvements in Steam-Generators; and Ido hereby declare the following to be a' full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same, reference being hadto the accompanying drawings, andto the letters of reference markedthereon, forming part of this specification.

My invention relates to steam generators for use in clothes cleaningplants, where a moderate supply of low pressure saturate steam isrequired in the renovation and pressing of garments; and the object ofthe present invention is to supply such a generator, which can beeconomlcally constructed and operated, and in which the steam and watercontainer will not be subjected to the direct action of the fire.

To accomplish the objects of my invention I provide a primary or heatingchamber of comparatively shallow vertical cross-section, which isprovided with one or more fire passages therethrough which aresurrounded by water in said primary chamber, and under said primarychamber there is a means of providing heat for heating water within saidchamber. This primary or heating chamber is preferably provided with ahand-hole by means of which access may be had to the interior thereof.

I also provide a vertically elongated secondary chamber or receptaclefor water and steam, which is in circulatory communication with saidsecondary chamber, and placed in such a position with relation theretothat it does not receive the direct action of. the fire supplied to theunder side of the primary chamber. In order to conserve as many aspossible of the heat units of the fire-gas, I inclose both primary andsecondary cham bers in a shell which serves to confine the products ofcombustion around the exterior walls of said chambers.

This secondary chamber is preferably constructed of tubing about sixinches in diameter and thirty inches long, the ends of which are closedby means of caps ofordinary construction, the lower cap being preferablyconnected with the primary chamber by means of a short horizontal pipe,with another pipe leadin from the upper portion of said primary 0 amberinto the secondary chamber above the lower cap. This construction andarrangement is very eflicient in operation, and inexpensive to make.

These and other features of my invention are hereinafter fully describedand pointed out and are illustrated in the accompanying drawings inwhich 2- Figure 1, is a side elevation, partially in section, of a steamgenerator embodying my invention.

Fig. 2, is a transverse section of the same on the line 22 lookingdownward in Fig. 1.

Fig. 3, is a like view on the line 3-3 looking downward in Fig. 1.

Fig. 4, is a horizontal section of the lower chamber-cap and primarychamber on the line in Fig. 1, looking downward; the same being on anenlarged scale and removed from its inclosing shell.

In these drawings A indicates a piece of tubing of suitable length anddiameter, the

steam under pressure higher than atmospheric. From one. side of thelower cap A. a blow-off pipe extends which is provided with the usualblow-ofli' valve by means of which the water in the chamber can be'drained when desired.

Connected with the lower cap A, -by means of a nipple a is a relativelyshallow primary water heating chamber B which is provided with one ormore fire passages B, therethrough which are surrounded with the waterin said chamber, and from said primary chamber B a pipe 0 extendsupwardly therefrom and is tapped into the secondary chamber A above thelower cap A, preferably just under the normal water line therein. 1

The primary heating chamber is preferabl provided with a neck Bextending latorally from the edge thereof, which neck is oval incross-section and is rovided with an internal annular flange a a ted toengage an ordinary hand-hole late The object of said neck and hand holeplate being to give ready access to the interior of said primary chamberwhen desired, and-the walls of the fire-passages B tying as they do theupper and lower walls of the primary chamber providing surfaces torece1ve the action of the products of combustion and transmit the sameto the water in said chamber and surrounding such fire-passage's.

The rimary heating chamber B is preferably ocated in the same horizontalplane with the lower cap A of the secondary chamber A, and at one sidethereof, so that the walls of secondary chamberA are not subject to thedirect action of the fire under the primary chamber B. Surrounding theprimary chamber 13 and the lower end of the secondary chamber A is anoblong casing D, which has an opening d in one end of the top thereofthrough which the chamber A is supported, the perimeter of said openingd being in spaced relation to the circumference of the chamberA.

I preferably provide an upturned annular flange d around said openind d,around which flange a vertical shell E is fitted, which shell E extendsupwardly to a point slightly above the upper cap A of the chamber A,where it is provided with a cover E, which has a smoke exit opening etherethrough, from which a smoke-flue (not shown) may be extended tosuch point as may be most convenient. A steam outlet F leads from theupper ca A throu h the cover E, to a safety va ve F of or inaryconstruction, and through a branch to the point of steam consumption,not shown.

Under the rimary heating chamber B, within the inclosing casing D isplaced the heating means, shown in Fig. 1 in the form of an ordinarygas-burner. It is obvious however, that other means of supplying heatunder the primary water heating chamber B can be used with good resultswithout material chan e in the construction of the apparatus as s own.

In the drawin s I: have shown the upper surface of the inc osing shell Das being flat; the object thereof being to rovide a place upon which tolocate a fe water heating tank G which I preferably form to fitpartially around the vertical shell E so that the contents of the tank Gwill absorb heat from said inclosing shells D and E; the bottom of thefeed-water tank G being artially over the primary water heating 0 amber,B so that Fit receives heat from both shells D an nausea piirpose a.pipe H extends from said In operation the primary and secondary chambersB and A are supplied with water until the level thereof within thechamber A is slightly above the point where the pipe 0 enters thechamber A; and the feed-water tank is filled with water. Fire is thenplaced under the shallow primary heating chamber B, so that the flameand products of combustion engage the exterior surface thereof and passthrough the fire passages B therein, and then travel horizontall in theshell ,D under the feed-water tank and thence upwardly through theopening 01 from whence they move upwardly within the shell E around tosecondarilchamber A to the smoke exit e in the cover The water in theprimary heating chamber B, by means of the action of the fire, and theshallowness thereof-within said chamber is rapidly converted to steamwhich travels upwardly throu h the.pipe C to the secondary chamber A, t1e action of the heated gas within the shell E acting to preventcondensation of the steam within the chamber A. It will be evident tothose skilled in the art that the device I have shown and hereindescribed will be very economical in construction and operation.

Having thus fully shown and described my invention so that those skilledin the art can utilize the same, what I claim as new and desire tosecure b Letters Patent is In a device of the c ass described ahorizontally elongated casing, a vertically elongated casing incommunlcation therewith, a primary water heating unit within one end ofsaid horizontall elongated casing a secondary water an steam memberwit'in said vertical casing extending downwardly into said horizontallyelongated casing in circulatory communication. with said primary waterunit, a feed-water tank mounted on said horizontally elongated casingover said primary water unit and contacting with said vertical casing,and means to supply heat within said horizontally elongated casing,substantially as set forth.

n testimony whereof I afiix my signature.

ARTHUR E. SNOW.

